https://github.com/tuwien-cms/hubbardatoms.jl
Analytic one- and two-particle vertices for the Hubbard atom
https://github.com/tuwien-cms/hubbardatoms.jl
Last synced: 2 months ago
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Analytic one- and two-particle vertices for the Hubbard atom
- Host: GitHub
- URL: https://github.com/tuwien-cms/hubbardatoms.jl
- Owner: tuwien-cms
- License: mit
- Created: 2024-07-22T13:42:22.000Z (10 months ago)
- Default Branch: main
- Last Pushed: 2024-07-22T14:23:24.000Z (10 months ago)
- Last Synced: 2025-02-22T06:18:52.730Z (3 months ago)
- Language: Julia
- Size: 11.7 KB
- Stars: 3
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# HubbardAtoms.jl
Analytic one- and two-particle vertices for the Hubbard atom, taken from Phys. Rev. B 98, 235107 (2018) by Thunström et al.:
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.235107.
Available are the functions `bare_vertex`, `gf`, `chi`, `chi0`, `full_vertex`, `gamma`, `irreducible_vertex`, `channel_reducible_vertex`, `hedin`.
To use these, you need to import `SparseIR.jl` to be able to create `MatsubaraFreq` objects.
## Example
```julia
using HubbardAtoms, SparseIR
U = 2.0
beta = 10.0
at = HubbardAtom(U, beta)
w = (FermionicFreq(11), FermionicFreq(-3), BosonicFreq(8))
full_vertex(MagneticChannel(), at, w)
```